The unit commitment (UC) problem aims to find an optimal schedule of generating units subject to demand and operating constraints for an electricity grid. The majority of existing algorithms for the UC problem rely on solving a series of convex relaxations by means of branch-and-bound and cuttingplanning methods. The objective of this paper is to obtain a convex model of polynomial size for pra...

The main objective of the paper is to minimize use conventional generators and optimize fuel cost. To generators, solar thermal power plant (STPP) proposed in this paper. An approach for optimal location STPP also cost, firstly unit commitment (UC) applied generators. Then genetic algorithm (GA) used cost committed suggested method tested on an IEEE 14 bus test system 24 hr. schedule with varia...

as renewable energy increasingly penetrates into power grid systems, new challenges arise for system operators to keep the systems reliable under uncertain circumstances, while ensuring high utilization of renewable energy. this paper presents unit commitment (uc) which takes into account the volatility of wind power generation. the uc problem is solved with the forecasted intermittent wind pow...

In this paper, we present a unified decommitment method to solve the unit commitment problem. This method starts with a solution having all available units online at all hours in the planning horizon and determines an optimal strategy for decommitting units one at a time. We show that the proposed method may be viewed as an approximate implementation of the Lagrangian relaxation approach and th...

the issue of unit commitment is one of the most important economic plans in power system. in modern and traditional power systems, in addition to being economical of the planning, the issue of security in unit operation is also of great importance. hence power system operation confronts units’ participation and input considering network security constrains. the issue of units’ participation is ...

Abstract In power system studies the unit commitment problem (UC) is solved to support market decisions and assess adequacy. Simplifications are made solve UC faster, but they without considering consequences on solution quality. this study we thoroughly investigated impacts of simplifications quality computation time a benchmark set consisting almost all available instances in literature. We f...